#include <IMFExpansionPt.h>
An IMFExpansionNVector is a point whose coordinates are the coefficients (constant, linear, quadratic) in a Taylor series for the surface containing a trajectory -- given by the constant term. Various information tags the point, including a link to the preceeding point along the fat trajectory, type information (an end point, interpolated or on the manifold of initial conditions, or a point interior to the trajectory). The remaining tags are used to determine if two charts overlap.